Shapeways has paired up with skill share to teach an online beginner's course and I believe it's free. The software needs aren't bad since you can find freeware that will work just fine.
http://www.skillshare.com/classes/d...From-Concept-to-Product/2097968974?via=school
http://www.skillshare.com/classes/d...From-Concept-to-Product/2097968974?via=school